string(254) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=1000%E5%85%86%E7%9A%84%E5%AE%BD%E5%B8%A6%E6%B5%8B%E9%80%9F%E5%8F%AA%E6%9C%89700%E5%85%86 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
1000兆的宽带测速只有700兆
